Wire-coupling.



PATENTED APR. 9, 1907.

W. HOPMANN. WIRE COUPLING.

APPLICATION FILBDJUNE 1,1903.

, 'i NO; 849,612.

' tvtLHEL-M'norintxx. or Kt'rrZscnE'verront,y GERALANY.

WmE-COUPLING.

Specification of Letters Patent.

Patented April 9, 1907.

Application ined June 1,1903. seran N6. 159.523.

To (LIZ whom, it muy concer/L:

Be it known that I, WILHELM Horimxx. a i

subject of the Grand Dukeof Hesse, residing at Kotzschenbrodav Saxony, of Germauv, have invented certain new and useful Improvements in Wire-Couplings, of which the following is a specification.

This invention relates to improvements in couplings or connecting sleeves or bonds for electric and other wires. A

The invention has for its object thearrangement of a tubular sleeve consisting of a 4 tube of oval section and provided with oppositely-disposed protuberances or chambers.

in which the wires to be coupled or connected are be'nt or pressed b v means of rivets. pms, or wedges, the narrow parts of the tube being hardened bvcompressing the vI netal and reducing thesize of the tube. ln this way the wires are secured to the sleeve andrnay vbe held securely in it without soldering.

The object of theinvention isto provide an eliicie'nt means for connecting the ends 'oflelectric wires, where it is, as well known, very diflicult to solder together the ends of the Wires or to secure them to a wire-connect-or by soldering. I

The sleeve is preferably made of metal of any kind in the form of an oval tube provided with protuberances 'stamped out.

5 The width of the oval tube is sufficiently' greatto afford room for to their straight position the insertion o f the two wires to be connected. The sleeve has lateral holes, through which, after the wires have beenintroduced' into the sleeve, rivets, wedges, studs, or pointed pins are introduced laterall)v or at right ,angles to the longitudinal axis of the wires and the sleeve', said rivets, &c., passing between both wires and bending them outward into the longitudinal protube'rances. The wires thus bent cannot return long as there is a wedge or rivet between them. The wires are thus sccurel ixed in place b v one, two, or more rivets, ttc., within the protuberances, and even a considerable pull or push on the wires could not withdraw them 'from the;y sleeve. rl`he strengthof the sleeve is secured i by the fact that the thickness of the wall on 1 the same asI 'the original thickness of the wall of the oval the protuberances is precis-ehv tube and that the metal of this part of the wall remains soft, whereas the parts of the I. wall of the tube situated between the pro-A in the Empire l tttbcrances are strongervbv compressing and jumping. Therefore they are also more solid, fso that ihe coupling-Sleeves are most resistant at the points of' the change ol" straight into the curved partsv or protuberances of the sleeve, which points to the greatest pull or strain.

Apparatus for the manufacture of connecting-sleeves according to the invention is illustrated in lFigures 1 to 4 of the accompairving drawings, Figs. 1 and 2 showing. respectively, a longitudinal and a cross-section through the press after the tube has .been introduced. Figs. 3 and 4 show, respectively, a longitudinal and a cross-section of the press after ithas acted on the tube.

As will be seen from t-he last two figures, the walls of the sleeves are strengthened at the ortions between'the protuberances or proljections, as the. material at these points is compressed to a smaller circumference.

The sleeves are manufactured from tubes trof any desired metal, ,preferably copper,

laced in a suitably-shaped die b and pressed, iiv means of avplunger or counterpart die c,

round a core dl enable it to be subsequently removed 'from the narrow'sidefs of thejsleeve op osite longitudinal projections e. As wifi)l be seen, these reduced and strengthened portions of the sleeve vare exposed (when-the latter is used for connectin -wires) to the greatest pulling strain, so t at sleevesprepared in accordancewith lthis invention havefconsiderable strength with a.v comparatively small weight.

corresponding projections,y from, theA finished sleeve is effected as follows: fter removing the two screws 'or keysjf the central wedge shaped portion Cunha-Withdrawn, Whercu on .the twoouter parts, provided with protu erances, can also be Withdrawn,- Fig. 5.

Figs. 6 to 9 show two forms of sleeves Jfor connecting electric wires manufactured acctin'ding to. this invention.,v The straight wires g to be connected are introduced into the formed sleevev mandrel is passed through lateral holes i, in the' sleeve between thewires, whereby-the wires g are' bent out and forcedinto the recesses e e. The intervals thus reduced beltween the wires are filled in y means of are' subject (built up in three sections to The removal 'of the. core d, provided with the tube) insuch a manner as to produce on a, and a conical, pointed y rivets 7L or the like, which keep the wires in bent position and preventtheni from slipthey are bent.

ping or returning to their original forni.

In connecting two single wires oval-shaped i sleeves are used, such as shown in Figs. 6 and 7, the wires being introduced one above the other. several wires it is preferable to use sleeves of circular cross-section, as shown iii Figs. 8 and 9, in which the end ofthe cables may be butted together at the center, and staples 7i are driven through the holes i toforce the upper and lower wires into the recess eaiid secure the whole firmly together.

Figs-6 and 8 clearly show that the re# duced hardened and strengthened portions of the sleeve-have to resist a considerable pulling strain, due partly to thewires being spread out and partlywto thepiiliiofthe For connecting cables consisting of tightly-stretched wil-cs. which tends to straighten the wires ai ne places at which of hardened compressed iiietiil und peit'hi'utions between each tivo pockets forming :i pair, substaiitiall) as set forth.

vIn testimony whereof I have signed in v i naine" to this speeiiicatioii inthe presence of two subscribing witnesses.-`

.Vivitiiessesi v Rei). Sci-miur,

P iiii ARRAS. 

